package com.kuson.springcloud.controller;

import com.alibaba.csp.sentinel.annotation.SentinelResource;
import com.alibaba.csp.sentinel.slots.block.BlockException;
import com.kuson.springcloud.entities.CommonResult;
import com.kuson.springcloud.entities.Payment;
import com.kuson.springcloud.service.PaymentService;
import com.sun.deploy.security.BlockedException;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;

/**
 *   //@SentinelResource(value = "fallback") //没有配置
 *     //@SentinelResource(value = "fallback",fallback = "handlerFallback") //fallback只负责业务异常
 *     //@SentinelResource(value = "fallback",blockHandler = "blockHandler") //blockHandler只负责sentinel控制台配置违规
 *    // @SentinelResource(value = "fallback",fallback = "handlerFallback",blockHandler = "blockHandler",
 *           //  exceptionsToIgnore = {IllegalArgumentException.class})
 */
@RestController
@Slf4j
public class CircleBreakerController {

    public static String SERVICE_URL="http://nacos-payment-provider";
    //restTemplate调用远程服务的过程
    @Resource
    private RestTemplate restTemplate;
    // OpenFeign
    @Resource
    private PaymentService paymentService;
    /**
     * 整合ribbon代码
     * @param id
     * @return
     */
    @RequestMapping("/consumer/fallback/{id}")
     @SentinelResource(value = "fallback",blockHandler ="blockHandler",fallback = "handlerFallback",
          exceptionsToIgnore = {IllegalArgumentException.class})//配置了Java自身程序异常和微服务调用异常和Java出现异常后要忽略的异常
    public CommonResult<Payment> fallback(@PathVariable Long id) {
        CommonResult<Payment> result = restTemplate.getForObject(SERVICE_URL + "/paymentSQL/"+id, CommonResult.class,id);

        if (id == 4) {
            throw new IllegalArgumentException ("IllegalArgumentException,非法参数异常....");
        }else if (result.getData() == null) {
            throw new NullPointerException ("NullPointerException,该ID没有对应记录,空指针异常");
        }

        return result;
    }
    //程序出现异常了，就要有一个兜底的方法
    public CommonResult handlerFallback(@PathVariable Long id,Throwable e){
    Payment payment=new Payment(id,null);
    return new CommonResult(444,"兜底异常handlerFallback exception内容"+e.getMessage(),payment);
   }

    //sentinel控制配置出现了服务降级的兜底的方法，以前都是使用系统自带的异常页面。
   public CommonResult blockHandler(@PathVariable Long id, BlockException e){
    Payment payment=new Payment(id,null);
    return new CommonResult(445,"兜底异常blockHandlerback,exception内容"+e.getMessage(),payment);
   }

    /**
     * OpenFeign 方式的方法来调用远程的服务的方法
     * @param id
     * @return
     */
    @GetMapping(value = "/consumer/paymentSQL/{id}")
    public CommonResult<Payment> paymentSQL(@PathVariable("id") Long id) {
        return paymentService.paymentSQL(id);
    }


}
